The peripheral shall provide four bi-directional serial ports supporting RS-232 connections, with or without hardware flow control. One serial port shall also support RS-485 and RS-422 connections. The collection of serial ports shall be remotely configurable, providing an interface to terminals with various baud rates and hardware flow control requirements. Each serial port shall be independently configurable from the system processor. The peripheral shall operate natively on a standard gigabit Ethernet infrastructure available from a broad range of network infrastructure manufacturers and shall support 802.1x authentication. The peripheral shall operate on PoE or DC power input and have the following front panel controls and indicators: Unit ID button, green ID LED, and blue Power LED. A web interface shall provide basic network and security configuration, status, and log retrieval. The peripheral shall be natively integrated into Q-SYS Designer Software for network discovery, real-time configuration, control, monitoring, and supervision. The peripheral’s rear panel shall provide two 2-pin power Euroblock connectors for daisy-chainable DC power, four 5-pin serial ports on a dual-row 20-pin Euroblock connector with individual flow control and ground pins, a recessed settings reset button, and two RJ45 connectors for daisy-chainable Ethernet configured as Q-SYS Network ports: one PoE port, RJ45 1000 Mbps only; one Pass-thru port, RJ45 1000 Mbps only. The peripheral shall feature multiple mounting options including a standard 19-inch rack or surfaces such as under-table or on-wall. It shall be one-quarter (1/4) rack space wide and less than one rack unit tall (1.59 inches / 4.04 cm), allowing mounting alongside quarter-rack width QSC Q-SYS QIO peripherals using an optional rack tray kit. The peripheral shall include two reversible steel angle brackets for surface mounting. The peripheral dimensions shall be 1.59" x 4.25" x 5.5" (4.04cm x 10.80cm x 13.97cm). The peripheral shall be the QSC QIO-S4.